package com.ruoyi.web.controller.common;

import com.ruoyi.common.config.RuoYiConfig;
import com.ruoyi.common.config.ServerConfig;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.utils.ShiroUtils;
import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.file.FileUploadUtils;
import com.ruoyi.common.utils.file.FileUtils;
import com.ruoyi.system.domain.FileUpload;
import com.ruoyi.system.service.IFileUploadService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.ArrayList;
import java.util.List;
import java.util.Objects;

/**
 * 通用请求处理
 *
 * @author ruoyi
 */
@Controller
@RequestMapping("/common")
public class CommonController {
    private static final Logger log = LoggerFactory.getLogger(CommonController.class);

    @Autowired
    private ServerConfig serverConfig;

    private static final String FILE_DELIMETER = ",";
    @Autowired
    private IFileUploadService fileUploadService;

    @RequestMapping("/pdfPreview")
    public String pdfPreview(String url, ModelMap modelMap) {
        modelMap.put("url", url);
        return "system/pdf-preview.html";
    }

    /**
     * 通用下载请求
     *
     * @param fileName 文件名称
     * @param delete   是否删除
     */
    @GetMapping("/download")
    public void fileDownload(String fileName, Boolean delete, HttpServletResponse response, HttpServletRequest request) {
        try {
            if (!FileUtils.checkAllowDownload(fileName)) {
                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", fileName));
            }
            String realFileName = System.currentTimeMillis() + fileName.substring(fileName.indexOf("_") + 1);
            String filePath = RuoYiConfig.getDownloadPath() + fileName;

            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, realFileName);
            FileUtils.writeBytes(filePath, response.getOutputStream());
            if (delete) {
                FileUtils.deleteFile(filePath);
            }
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }

    /**
     * 通用上传请求（单个）
     */
    @PostMapping("/upload")
    @ResponseBody
    public AjaxResult uploadFile(MultipartFile file) throws Exception {
        try {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            // 上传并返回新文件名称
            String fileName = FileUploadUtils.upload(filePath, file);
            String url = serverConfig.getUrl() + fileName;
            AjaxResult ajax = AjaxResult.success();
            ajax.put("url", url);
            ajax.put("fileName", fileName);
            ajax.put("newFileName", FileUtils.getName(fileName));
            ajax.put("originalFilename", file.getOriginalFilename());
            return ajax;
        } catch (Exception e) {
            log.error("文件上传失败", e);
            return AjaxResult.error(e.getMessage());
        }
    }

    /**
     * 通用上传请求（多个）
     */
    @PostMapping("/uploads")
    @ResponseBody
    public AjaxResult uploadFiles(List<MultipartFile> files, Long bizId, String bizType) throws Exception {
        try {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            List<FileUpload> uploadList = new ArrayList<>();
            for (MultipartFile file : files) {
                FileUpload fileUpload = new FileUpload();
                // 上传并返回新文件名称
                String fileName = FileUploadUtils.upload(filePath, file);
                String url = serverConfig.getUrl() + fileName;
                fileUpload.setFileName(file.getOriginalFilename());
                fileUpload.setFileType(file.getContentType());
                fileUpload.setUrl(url);
                fileUpload.setFileSize((double) file.getSize() / 1024  / 1024);
                fileUpload.setCreateBy(ShiroUtils.getLoginName());
                fileUpload.setUpdateBy(ShiroUtils.getLoginName());
                fileUpload.setBizId(bizId);
                fileUpload.setBizType(bizType);
                uploadList.add(fileUpload);
            }
            fileUploadService.saveBatch(uploadList);
            AjaxResult ajax = AjaxResult.success();
            ajax.put("uploadList", uploadList);
            return ajax;
        } catch (Exception e) {
            return AjaxResult.error(e.getMessage());
        }
    }

    @PostMapping("/delFile")
    @ResponseBody
    public AjaxResult delFile(Long id) throws Exception {
        FileUpload fileUpload = fileUploadService.getById(id);
        AjaxResult ajax = AjaxResult.error("文件不存在");
        if (Objects.isNull(fileUpload)) {
            return ajax;
        }
        String[] uploads = fileUpload.getUrl().split("/upload");
        // 上传文件路径
        String filePath = RuoYiConfig.getUploadPath();
        boolean result = FileUtils.deleteFile(filePath + uploads[1]);
        if (!result) {
            ajax = AjaxResult.error("文件删除失败");
            return ajax;
        }
        fileUploadService.deleteFileUploadById(id);
        return AjaxResult.success();
    }

    /**
     * 本地资源通用下载
     */
    @GetMapping("/download/resource")
    public void resourceDownload(String resource, HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        try {
            if (!FileUtils.checkAllowDownload(resource)) {
                throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));
            }
            // 本地资源路径
            String localPath = RuoYiConfig.getProfile();
            // 数据库资源地址
            String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);
            // 下载名称
            String downloadName = StringUtils.substringAfterLast(downloadPath, "/");
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, downloadName);
            FileUtils.writeBytes(downloadPath, response.getOutputStream());
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }
}
